Ok I have this word problem i am confused on. It says a test has 4 choices a, b, c, and d if a student answers all 3 questions what is the probability they got all of them correct???
Ok I have this word problem i am confused on. It says a test has 4 choices a, b, c, and d if a student answers all 3 questions what is the probability they got all of them correct???
Any help would be greatly appreciated.
Probability of getting any one question right when choosing at random is $\displaystyle 0.25$ (four possibilities, only one of which is correct).
Probability of getting three out of three right is $\displaystyle 0.25^3$.